<div class="title gray">
    切换应用：
</div>
<nz-select class="appselector" nzShowSearch nzAllowClear nzPlaceHolder="切换应用" [(ngModel)]="selectedAppId">
    <nz-option nzLabel="Jack" nzValue="jack"></nz-option>
    <nz-option nzLabel="Lucy" nzValue="lucy"></nz-option>
    <nz-option nzLabel="Tom" nzValue="tom"></nz-option>
</nz-select>
<div class="space">

</div>